Glass breaking hand tool



Dec. 19 1950 D. R. CORRADO cuss BREAKING HAND TOOL Filed April 19, 1946 Patented Dec. 19, 1950 UNITED STATES PATENT OFFICE Claims.

This invention relates to glaziers tools, and more particularly to a hand-operated glassbreaking tool adapted to remove a small block of glass from the edge of a previously cut section of plate glass.

One object of the present invention is to provide a glass breaking tool of the above nature in which the block is removed from the plate glass by a twisting action of said tool.

A further object is to provide a device of the above nature which will be especially useful in close quarters where only a small twisting movement of the tool is permitted, such as underneath an awning located above the plate glass installation of a store front or in the corner of a window.

A further object is to provide a device of the above nature which will be simple in construction, inexpensiveto manufacture, easy to install and manipulate, compact, ornamental in appearance, and very efficient and durable in use.

With these and other objects in view, there has been illustrated on the accompanying drawing one form in which the invention may conveniently be embodied in practice.

In the drawings,

Fig. 1 is a vertical sectional view taken through a sheet of plate glass as it appears when being installed in a frame of a store window with the glass breaking tool in position to break away a small block from the edge of said glass in alignment with the usual window clip which is used to secure the edge of the glass to the face molding of the window frame. I

Fig. 2 is a front view of the window frame and the plate of glass in which two rectangular blocks have already been broken from the left hand edge thereof.

Fig. 3 is a side view of the tool, shown by itself as it appears when in position for breaking away a block from the edge of the plate glass sheet and showing the method of twisting the tool to remove said block.

Fig. 4 is a top plan view of the same.

Fig. 5 is a side view of the same after the block of glass has been broken away.

Fig. 6 is a fragmentary perspective view of the edge of a sheet of plate glass showing a notch which has been broken in the edge thereof and the block which has been broken therefrom by the improved tool.

Referring now to the drawing in which like reference numerals denote corresponding parts throughout the several views, the numeral H1 indicates an elongated handle of the tool, which is circular in cross section and has a socket H at one end for receiving a small connecting screw in l2. The numeral l3 indicates generally a triangular metallic tool shank having a tapped socket M at its upper end for receiving the threaded end l5 of the connecting pin I2 so that the handle may be easily removable from the tool shank whenever desired.

In order to permit the tool to be operated in close quarters, the outer end of the tool shank i3 is provided with an inclined outer flat face It and a short inner fiat face ll parallel to the face |6. The shank also has a curved end |8 offset from the axis of the handle of the tool and the shank thereof. The curved end l8 is provided with a reversely turned tapered prong It having a flat outer face located in the same plane as the face 11. A rectangular slot 2|! is provided between said prong l9 and the shank l3 of the tool-the angle of said slot being preferably about 28 to the axis of the shank of the tool handle.

As clearly shown in Figs. 1 and 2, a plate glass sheet 2| is first prepared by means of a glass cutter, not shown, with a plurality of short cutting lines 22 parallel to the edges of the top and sides of said sheet 2| from which blocks 23 of glass may thereafter be easily removed by means of the glass-breaking tool of the present invention. In Figs. 2 and 6, the notches left after the removal of the blocks are indicated by the numerals 24, and said notches are adapted to receive the usual clips for securing a glass-attaching face molding, not shown, located at the sides of the window frame 25. r

The numeral 26 indicates an awning located at the top of the window frame.

Operation In operation, when installing a sheet of plate glass 2| it will be placed alongside the window frame 25 below the awning 25 in the position shown in Fig. l. The glazier will then cut or scratch the series of lines 22 along the edges of the plate glass sheet 2| at the positions indicated on Fig 2 of the drawing, these points being in alignment with the locations of the window clips, not shown, for securing the face molding of 23 will be easily broken away leaving a notch 24 in the edge of the glass 2|. The screw which holds the face section of the metal may then be passed through the notches in the edge of the glass and will hold the plate glass securely in place.

One advantage of the present invention is that the glass breaking tool will not interfere with the awning 26 in any Way and may be used in confined locations, store fronts, and other places very efiiciently.

A further advantage is that the tool handle may be more easily grasped than with former types of glass breakers where the cutting parts were at right angles with the shank of the tool. h

It will be understood that the tool of the present invention, if desired, may be made all in one piece and constructed of plastic, fiber, metal, or wood or other suitable material within the spirit and scope of the invention.

While there has been disclosed in this specification one form in which the invention may be embodied in practice, it is to be understood that this form is shown for the purpose of illustration only, and that the invention is not to be limited to the specific disclosure, but may be modified and embodied in various other forms without departing from its spirit. In short, the invention includes all the modifications and embodiments coming within the scope of the following claims.

2. The invention as defined in claim 1, in which said slot is located at an angle of at least 20 degrees from the axis of the shank and handle of said tool.

3. The invention as defined in claim 1, in which the shank of said tool has a flat outer face which is inclined inwardly to said curved end section from a point adjacent said handle.

In a glass breaking tool, a handle, a forwardly convergent tapered tool shank, said tool shank having a curved end section laterally ofiset to one side of the handle and shank, and said ofiset end section having a glass breaking slot opening rearwardly at said side of the shank.

5. The invention as defined in claim 1, in which the end of said shank at one side of said slot forms a tapered prong offset from the body of the shank.

DOMENIC RICHARD CORRADO.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 140,426 Monce July 1, 1873 419,018 King et al Jan. 7, 1890 ee4,921 Hayward Apr. 4, 1893 1,344,533 Cole June 22, 1920 1,344,562 Probasco June 22, 1920 1,656,104 Dunbar Jan. 10, 1928 FOREIGN PATENTS Number Country Date 139,354 Great Britain Mar. 4, 1920 

